ROBIN Gibb’s wife has been keeping a vigil by the singer’s bedside as he fights for his life.

Dwina has been “incredibly strong” and is “amazingly positive” that the Bee Gee will make a recovery from his coma, friends say.

But his family are becoming increasingly concerned for Robin, 62, who has liver and colon cancer. A friend said: “Dwina has been incredible. She has been such a rock of support for everyone and is so strong.

“She remains upbeat and is willing Robin on and on.

“She will never give up – just like his attitude throughout all his recent health problems. The pair share that same fighting mentality.”

Dwina has been joined at Robin’s bedside by his son Robin-John, 29, his Bee Gee brother Barry, 65, and mum Barbara, 91, who has flown in from the US.

Robin, who recently spoke of being in remission from cancer, was heartbroken when he was forced to cancel an appearance on Tuesday at the premiere of the Titanic Requiem, which he composed with Robin-John.

Robin-John said: “My dad has had a hard recovery from cancer. When you get rid of the cancer, a lot of periphery problems can occur. This is so sad.”

He said the family were praying for a recovery and that he felt honoured to be living in his father’s shadow.

Yesterday it was revealed that Robin was still ­writing lyrics in his ­hospital bed shortly before he lapsed into a coma.

He was scribbling ideas for songs and plans for the future in a notebook a few days ago while being treated for pneumonia.